Decimal Hours Calculator
Convert between hours:minutes and decimal hours instantly. Essential for payroll, timesheets, freelance invoicing, and any system that requires decimal time input.
Convert Hours
Quick Reference
Formula
Decimal Hours = Hours + (Minutes ÷ 60)
Divide the minutes by 60 to get the fractional part, then add the whole hours. For example: 7h 45m = 7 + (45 ÷ 60) = 7.75 decimal hours.
Worked Example
Scenario: A freelancer tracks 3 sessions: 2h 15m, 1h 45m, and 3h 30m. They need to invoice using decimal hours.
2h 15m = 2 + 15/60 = 2.25
1h 45m = 1 + 45/60 = 1.75
3h 30m = 3 + 30/60 = 3.50
Total: 2.25 + 1.75 + 3.50 = 7.50 decimal hours
At £80/hr, invoice amount = 7.50 × £80 = £600.00.
Common Mistakes
- Entering 45 minutes as 0.45 decimal. Minutes and decimal fractions are different. 45 minutes = 0.75, not 0.45.
- Adding HH:MM values directly. 7h 45m + 7h 30m ≠ 14h 75m. Always convert to decimal first, add, then convert back if needed.
How to Use
- 1
Choose the conversion direction
HH:MM → Decimal converts hours and minutes into a decimal. Decimal → HH:MM reverses it.
- 2
Enter your value
Type the hours and minutes, or the decimal number you want to convert.
- 3
Click Convert
The result appears instantly.
- 4
Copy to clipboard
Use the copy button to paste directly into payroll software or an invoice.